Summary

Vegeta's first transformation into a Super Saiyan

Before Android 19 can finish drainingGoku's energy, Vegeta arrives on the scene, saving Goku by kicking the Android in the face. Yamcha then escorts Goku away from the battlefield in order to administer the Heart Medicine to him back home. Vegeta squares off against the Androids and, much to everyone's surprise, transforms into a Super Saiyan.

Android 20 tells Vegeta not to destroy Android 19

It is revealed that, whereas Goku's first transformation was triggered by his rage over Frieza's murder of Krillin, Vegeta's transformation was triggered by his rage at simply being unable to surpass Goku. The battle then begins, and it is clear that Vegeta has the edge over Android 19. Even the android's Energy Absorption proves futile, as Vegeta tears off the Android's arms, making the technique impossible to use. As the Android runs in fear, Vegeta launches his Big Bang Attack and finishes the battle, leaving nothing but the Android's head intact. Android 20 then escapes into the nearby cliffs, planning to use the terrain to launch a surprise attack on the fighters.